
MARKARIAN’S CHAIN
Galaxy cluster filament • Virgo • 50 million light-years from Earth
🔭
Askar FRA400
📷
ZWO 2600MC Pro
🌃
Bortle 8
⏱️
10 hours
🗓️
April 2021
Overview
Markarian’s Chain is a striking alignment of galaxies located around 50 million light years from Earth in the constellation Virgo. The galaxies in the chain share a common motion through space and form part of the wider Virgo Cluster. The two brightest members are M84 and M86, which anchor the centre of the scene. Beyond them lie many more distant background galaxies, appearing much smaller and fainter. In total, at least 30 galaxies can be identified within this single image.
Background
Spring in the Northern Hemisphere is known as Galaxy Season because they’re the main targets visible. Unfortunately, galaxies are the toughest targets for my set-up of wide-field telescope in a city. Light pollution makes it a challenge to get any decent signal, and they’re so small that they appear as little more than small specks in my field of view. Makarian’s Chain is a string of galaxies that you actually need a wide-field telescope to image altogether though, so lacking any better targets I decided to give it a go.
The result is mixed… I don’t think that the quality is particularly good, although it’s good that anything’s visible through bright city skies. The integration time was 10 hours, before I fully embraced long integration times. With hindsight I realise I should have aimed for 20. That might have gotten me a better signal-to-noise ratio which is really needed for these faint fuzzies. Maybe I’ll get more data to add into the mix during a future Galaxy Season…

Kit list
This is the equipment I used to capture the image.
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Telescope: Askar FRA400
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Camera: ZWO ASI 2600MC Pro
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Guidescope: William Optics 32mm Slide-Base Uniguide
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Guidecam: ZWO ASI 120MM Mini
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Control: ASIAIR Plus
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Example source data
Here’s an example single subframe and freshly integrated stack, just with simple stretches applied.


Seestar S50 image
Seestar S50 telescope coming later…
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